freq. response charts

B

Buckeye_Nut

Audioholic Field Marshall
It looks like you have issues with room acoustics, and I wouldnt want either of those readings. Have you not done anything to treat your room? Good sound is all about the room!!
 
agarwalro

agarwalro

Audioholic Ninja
I agree with B.Nut. The 57Hz dip is definitely room interaction issues. If this dip is fixed, blue is better.
 
Sheep

Sheep

Audioholic Warlord
You can easily tell that the green line is the EP-500(100Hz roll-off).

You know, that is "decently" flat. Almost EVERYONE has a 60hz dip.

SheepStar
 
~JC~

~JC~

Audioholic
Almost EVERYONE has a 60hz dip.

SheepStar[/QUOTE]

Why would this be?
 
B

Buckeye_Nut

Audioholic Field Marshall
I'll bet the waterfall chart looks frightening.

30-40db nulls between 50-60hz isnt OK. Anyway.... it's all about your ears, and not numbers on charts. If you treated your room and finally heard the difference for yourself, you'd slap yourself in the forehead and mutter to yourself..... "what was I thinking?". I know I sure did!!

Your "ignorance is bliss" statement rings true, because you dont know what you're missing. Trying to fix a rooms sound without treating room acoustics is a fruitless endeavor. I built my first theater in the spring of 1995, and it wasnt until the spring of 2006 that I finally saw the light...... and Im still slapping myself in the forehead for not doing anything for so long.
 
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mike c

mike c

Audioholic Warlord
apparently, acoustics is an issue the WAF doesnt want to talk about until my couches, curtains and rugs arrive. (says the acoustics I want are ugly)

green line is EP500
blue line is both the EP500 and CHT15R colocated.

I therefore conclude, 2 subs if NOT the same quality should be colocated otherwise the lower quality sub will bring down the freq. extension.
 
mike c

mike c

Audioholic Warlord
about treating the room: is there a way to find out what kind of treatment I do JUST TO fix the 57hz dip? (or do I have to do the whole shebang - most corners, etc. etc.)
 
B

Buckeye_Nut

Audioholic Field Marshall
Why not start small, and experiment with panel placement and check results. You could maybe start off small by buying 4, and see how it goes. Four GIKs would run you about $300 shipped. I mention that brand because they're responsible for changing my theater sound forever. Sell your wife on the fact that panel placement can be attractive, and explain their importance to your sound integrity and clarity. Explain it to her in terms she can appreciate. Like....reducing the "boom", and making movie soundtracks more clear and detailed. Better bass with less boom is a great combo too. You can let her take ownership by letting her pick the colors, and you can make a decor statement out of them. Your job is to be the salesman and explain why 'she' needs them too. Once you let her into your world, she will join you in your pursuits and take ownership. She'll probably even have her eye on some new theater seats before long & want to paint the walls a dark color...etc, etc..etc... Heck, my wife is now giving me suggestions for which movie posters and frames she wants to hang. When she turned, she went all in, and our room is now 100% movie themed. She personally suggested I scrap every decoration she's collected over the past 15 years of marriage, and start from scratch in our theater room....LOL

That chart above doesnt even begin to tell the whole story. You wont believe the improvement in sound clarity and bass until the unwanted reflections are tamed. You have a great setup and you've obviously spent a quite a bit of $$$ acquiring it. The last step is the cheapest step of all, and it will let your current setup sound it's best by not letting the room to screw it up.

Do you ever find yourself adjusting your volume levels during loud segments of movies?? Maybe the loud stuff gets too overbearing, or the dialog becomes hard to follow when stuff is blowing up all around? Ya know.... and then the mrs. yells at you because the loud stuff is too loud and hurting her ears?? That is the room talking!! You wont believe the difference a treated room makes until you hear it for yourself. You'll have more satisfying tighter bass with less boom, clearer dialog, and the loud segments will sound like they were intended to sound:cool: Heck, it took me more than 10 years to discover the importance of room acoustics. You're getting a much better start than I did.... that's for sure.
 
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mike c

mike c

Audioholic Warlord
buckeye nut, why didnt you use the monster bass traps? why'd you opt for the 244's?

I mean, if we're talking bass, why did you use the 244's? also, how big a space behind the panels did you use? edit: looks like in your pictures that you didn't leave a gap behind the panels ... why not?

edit: do you have before and after freq. response measurements?
 
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mike c

mike c

Audioholic Warlord
behold the Axiodyne 1512
1100 watts of class D power!

 
B

Buckeye_Nut

Audioholic Field Marshall
mike c said:
buckeye nut, why didnt you use the monster bass traps? why'd you opt for the 244's?

I mean, if we're talking bass, why did you use the 244's? also, how big a space behind the panels did you use? edit: looks like in your pictures that you didn't leave a gap behind the panels ... why not?

edit: do you have before and after freq. response measurements?
For me, choosing the 4" panels was personal choice. I do have 4 mounted with airgaps. The two up front have airgaps (eventhough the left isnt a 90deg corner), and the two by the sub are corner mounted with airgaps. The only corner I couldnt do was the back left because of a nearby window. Instead, I hung it flush nearby. My room probably wouldnt be the best example to show to your wife because I have so many, and the 'shock-value' might freak her out.
The GIK website has a few customer pic examples that arent so
"in your face" like they are in my theater.
http://gikacoustics.com/clients.htm
The waterfall charts are best because they immediately confirm visually how room sound characteristics have changed. The before & afters are posted all over the net in various audio forums, and they're pretty easy to find. They are fun to look at and all, but as far as I'm concerned, all they do is offer visual confirmation of what you already know after treating. For example, if you 'just' treated your front two corners & the first reflection point behind your TV, and sit back to enjoy your favorite movie, you'll immediately hear a difference. When you run your new waterfall chart, it will only confirm what you already know and that is..... it should sound better.
I personally dont care about charts and numbers(or any of that), but I can respect why people want visual confirmation of the fruits of their labor. I dont claim to be an ecoustics expert because I'm not. I'm coming from the 'newby' perspective as someone who has recently experienced the vital importance of 'the room' in how your system will sound. Keep in mind, 50% of what reaches your ears during a movie is coming from the room!! As you can tell by my passion on the subject, you can tell the changes made a pretty big impression.

Im an amature hack when it comes to placement. Before I treated my room, I sent detailed drawings of my HT and talked with someone who does know what they're doing(Glen @ GIK) for placement direction. There are many good alternatives & choices out there, and that's the route I chose.

All I can say is WOW....... The "room upgrade" is the most important upgrade you can make!! Since experiencing this first hand, I cant resist the urge to spread the word so that others can experience this too. I feel kind of like a 'room treatment' crusader as of late.......LOL

Like Darth Vader once said...... "Never underestimate the power of the Room Treatment". Oh wait..... no... nevermind:D
 
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~JC~

~JC~

Audioholic
Thanks Sheep, but I'm disappointed. I was sure you were going to dazzle me with graphs and differential equations. :D
 
mike c

mike c

Audioholic Warlord
i still dont have the chest thump I want ... hmmm, I guess that was caused by an abnormal peak in the freq. response before. but I wonder at what frequency ... maybe I can look for a room placement with that attribute.
 
B

Buckeye_Nut

Audioholic Field Marshall
If you have a stack of subs, and you still have lousy bass, you need to look elsewhere to fix your problem.
 
mike c

mike c

Audioholic Warlord
my 57hz dip disappeared. although many other frequencies got messed up.

my bass traps


my bass traps ... engaged
 

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